Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

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Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
No Taxon (Glossary)
No Taxon (P)
No Taxon prosternum
prosternum noun, adjective prosternal - the under surface of the prothorax; the front-most prominent sclerite on the underside of the thorax.
The presence and/or form of a process or spine on the prosternum is important in the identification of some beetles (coleoptera) and orthoptera (e.g., spur-throated grasshoppers).

Photos illustrating the prosternum:
See Also

Divisions of thorax (front | middle | rear):

Dorsal surface of thorax (notum):

Lateral (pleural) surface of thorax:

Ventral surface of thorax:
prosternum | mesosternum | metasternum